Chemistry
The diagram given below shows electrolysis of water. Answer the following questions :
(a) Label A, B, C, D, E and F.
(b) Why is acidulated water used ?
(c) What is the ratio by volume for the gases collected ?
Answer
(a)
A → Hydrogen (H2)
B → Oxygen (O2)
C → Electrolytic Cell
D → Acidulated Water (Electrolyte)
E → Cathode
F → Anode
(b) Acidulated water is used as pure water is a bad conductor of electricity. When a small amount of acid, alkali or salt is added to it, only then it conducts electricity.
(c) Ratio by volume of the gases collected
Hydrogen : Oxygen = 2 : 1
Related Questions
State four uses of hydrogen.
Give three differences between Cathode and anode.
Give three differences between Cation and anion.
(a) Name the chemicals required to prepare hydrogen gas in the laboratory.
(b) Give a balanced chemical equation for the reaction.
(c) Draw a neat and well-labelled diagram for the laboratory preparation of hydrogen.
(d) How is hydrogen gas collected? Why?
(e) Give one chemical test for hydrogen. Why?